c++ - ld: library not found for -lGL on Mac

Question

从https://github.com/openglredbook/examples 下载了OpenGL编程指南的样例代码，但是运行的时候报错，在build文件夹运行cmake .. 报错如下(运行环境是Mac)：

-- Try OpenMP C flag = [-fopenmp=libomp]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Failed
-- Try OpenMP C flag = [ ]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Failed
-- Try OpenMP C flag = [-fopenmp]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Failed
-- Try OpenMP C flag = [/openmp]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Failed
-- Try OpenMP C flag = [-Qopenmp]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Failed
-- Try OpenMP C flag = [-openmp]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Failed
-- Try OpenMP C flag = [-xopenmp]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Failed
-- Try OpenMP C flag = [+Oopenmp]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Failed
-- Try OpenMP C flag = [-qsmp]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Failed
-- Try OpenMP C flag = [-mp]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Failed
-- Try OpenMP CXX flag = [-fopenmp=libomp]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Failed
-- Try OpenMP CXX flag = [ ]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Failed
-- Try OpenMP CXX flag = [-fopenmp]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Failed
-- Try OpenMP CXX flag = [/openmp]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Failed
-- Try OpenMP CXX flag = [-Qopenmp]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Failed
-- Try OpenMP CXX flag = [-openmp]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Failed
-- Try OpenMP CXX flag = [-xopenmp]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Failed
-- Try OpenMP CXX flag = [+Oopenmp]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Failed
-- Try OpenMP CXX flag = [-qsmp]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Failed
-- Try OpenMP CXX flag = [-mp]
-- Performing Test OpenMP_FLAG_DETECTED
-- Performing Test OpenMP_FLAG_DETECTED - Failed
-- Could NOT find OpenMP (missing:  OpenMP_C_FLAGS OpenMP_CXX_FLAGS)
-- Using Cocoa for window creation
-- Using NSGL for context creation
-- Building GLFW only for the native architecture
-- Configuring done
-- Generating done

然后运行make 报错如下：

[  6%] Built target vermilion
[ 15%] Built target glfw
[ 16%] Linking CXX executable ../bin/12-imageprocessing
ld: library not found for -lGL
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [../bin/12-imageprocessing] Error 1
make[1]: *** [CMakeFiles/12-imageprocessing.dir/all] Error 2
make: *** [all] Error 2

在网上搜了好久但是都没有解决，大家知道这是怎么回事吗？

Answer 1

问题已解决，CMakeLists.txt 文件26行https://github.com/openglredbook/examples/blob/master/CMakeLists.txt#L26 处，删除GL rt dl即可make成功。

Answer 2

我去下载了这个例子，在windows下能成功运行。
如图：
cmake 的make过程 选择的是visual2013 官方也说了visual 2013是可以的

使用visual studio 2013 打开项目编译

忽略这些不必要的错误，打开bin文件夹，也可看到有很多可执行文件

打开这些可执行文件

因为你的是mac平台，官网也说了使用cmake Unix makefiles 也是可以成功运行的。你可以和我一样去官网下载一个cmake的gui版，你选择Mac OSX。然后输入正确路径，配置你要用到的generator，因为我要用到visual 2013 于是我选择了visual 2013.你 要根据你自己的情况选择。

然后打开你的generator去make整个项目，最后会在bin目录下生成可执行文件。完成！

Answer 3

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